
*{
    margin: 0;
    padding: 0;
}
.top{
    background-color: #282B33;
    width: 100vw;
    height: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.top a{
    color: white;
    text-decoration: none;
}
a:link{color:aquamarine}

a:visited{color:black;}

a:hover{color:pink;}

a:active{color:#ccc;}
.top>div{
    width: 1000px;
    /*border: 1px solid red;*/
    display: flex;
    justify-content: space-between;
    color: white;
    font-family: 仿宋;
    font-size: 20px;
}
.left a{
    text-decoration: none;
}
.top>div>div:nth-child(2)>a{
    border: 1px solid skyblue;
}
.top>div>div:nth-child(2)>a:hover{
    box-shadow: 0 0 1px 1px #cccccc;
    color: green;
    font-weight: bold;
}
.left{
    background-color: #282B33;
    height: calc(100vh - 100px);
    color: white;
    width: 200px;
    display: flex;
    /*justify-content: center;*/
    float: left;
    /*align-items: center;*/
}
.left>ul>li>span{
    display: block;
    line-height: 50px;
    width: 110px;
    text-align: right;
    /*border: 1px solid red;*/
}
.left>ul>li>span:hover{
    color: lightsalmon;
    border-left: 6px solid aqua;
    /*margin-left: -50px;*/
    cursor: pointer;
}
.right{
    float: right;
    width: calc(100vw - 217px);
    height: calc(100vh - 100px);
}
.left>ul,ol,li{
    list-style: none;
}
.left>ul>li>ol{
    text-indent: 4em;
}

.show{
    line-height: 30px;
    display: block;
}
.show:hover{
    color: darkgray;
    cursor: pointer;
}
.hide{
    display: none;
}